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Helicopter hub magnetorheological shimmy damper

A technology of magneto-rheological and shimmy dampers, which is applied in the direction of rotorcraft, aircraft, motor vehicles, etc., can solve the problems of lack of adaptability, oil leakage of shimmy dampers, etc., and achieve strong adaptability, easy installation, and avoid power transmission Effects of wiring problems

Inactive Publication Date: 2007-07-11
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

These shock absorbers have the problems of oil leakage, characteristics affected by the environment such as frequency, temperature and load conditions, and are also passive damping devices, that is, the output damping force is fixed and lacks adaptability

Method used

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  • Helicopter hub magnetorheological shimmy damper

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Embodiment Construction

[0009] Figure 1 is a schematic diagram of the structure of the magneto-rheological damper for the helicopter hub. Describe concrete structure and implementation steps of the present invention according to accompanying drawing:

[0010] The specific structure of the present invention is that the excitation coil 6 is installed outside the damper, and the magneto-rheological fluid 9 is injected into the inner chamber of the liquid reservoir through the two liquid injection holes 7 of the liquid storage chamber. The cavity wall, the upper end cover and the armature 3 of the semicircular liquid reservoir 8 form the magnetorheological fluid return channel 2 . The reciprocating rotary piston 5 is connected with the rotary shaft 4 mounted on the armature 3 and reciprocates together, and the magnetorheological fluid 9 reciprocates in the magnetorheological fluid return channel 2 along with the reciprocating rotary piston 5 . When the excitation coil 6 is energized, a magnetic field is...

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Abstract

The invention relates to a hub magnetic flow variable shimmy damper of helicopter, wherein it comprises magnetic flow variable liquid 9, electromagnet 1, armature 3, and excitation coil 6 for generating magnetic field, rotation axle 4, excitation coil rotation piston 5, and semi-round liquid container 8. The magnetic flow variable liquid is poured into the chamber of liquid container; the rotation piston and the rotation axle are connected to rotate together; the magnetic flow variable liquid moves repeated in the liquid reflux channel along with the piston; via changing the input current, the output damping torque of shimmy damper can be changed. The invention can semi-automatically control ground resonance and air resonance of helicopter.

Description

1. Technical field [0001] The rotor hub magneto-rheological damper of the invention belongs to the intelligent material structure and the rotor hub damper of the helicopter. 2. Background technology [0002] Helicopter hub damper is a damper that is installed on the rotor hub of a helicopter and controls vibration and stability in the direction of vibration in the plane of rotation. It controls vibration and stability by consuming the vibration energy of the rotor in the direction of vibration It is a major technical measure to eliminate or control the "ground resonance" and "air resonance" of the helicopter. The vast majority of helicopters in the world are equipped with hub dampers. [0003] At present, the hub dampers used at home and abroad mainly include hydraulic dampers, viscoelastic dampers, and a small amount of friction dampers. These shock absorbers have the problems of oil leakage, and the characteristics are affected by the environment such as frequency, tempe...

Claims

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Application Information

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IPC IPC(8): B64C27/32F16F9/53
Inventor 夏品奇王唯
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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